Premium
Superior Electrical Conductivity in Hydrogenated Layered Ternary Chalcogenide Nanosheets for Flexible All‐Solid‐State Supercapacitors
Author(s) -
Hu Xin,
Shao Wei,
Hang Xudong,
Zhang Xiaodong,
Zhu Wenguang,
Xie Yi
Publication year - 2016
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201600029
Subject(s) - materials science , nanosheet , chalcogenide , supercapacitor , ternary operation , electrical conductor , electrical resistivity and conductivity , nanotechnology , conductivity , electrode , electrochemistry , chemical engineering , capacitance , optoelectronics , composite material , chemistry , electrical engineering , computer science , engineering , programming language
As the properties of ultrathin two‐dimensional (2D) crystals are strongly related to their electronic structures, more and more attempts were carried out to tune their electronic structures to meet the high standards for the construction of next‐generation smart electronics. Herein, for the first time, we show that the conductive nature of layered ternary chalcogenide with formula of Cu 2 WS 4 can be switched from semiconducting to metallic by hydrogen incorporation, accompanied by a high increase in electrical conductivity. In detail, the room‐temperature electrical conductivity of hydrogenated‐Cu 2 WS 4 nanosheet film was almost 10 10 times higher than that of pristine bulk sample with a value of about 2.9×10 4 S m −1 , which is among the best values for conductive 2D nanosheets. In addition, the metallicity in the hydrogenated‐Cu 2 WS 4 is robust and can be retained under high‐temperature treatment. The fabricated all‐solid‐state flexible supercapacitor based on the hydrogenated‐Cu 2 WS 4 nanosheet film shows promising electrochemical performances with capacitance of 583.3 F cm −3 at a current density of 0.31 A cm −3 . This work not only offers a prototype material for the study of electronic structure regulation in 2D crystals, but also paves the way in searching for highly conductive electrodes.